Solution: In The Planet of the Apes, humans "traveled" into the future by hibernating on a spaceship traveling relative to the Earth for 120 years before returning. If the ship traveled at 99.99% the speed of l

Problem

In The Planet of the Apes, humans "traveled" into the future by hibernating on a spaceship traveling relative to the Earth for 120 years before returning. If the ship traveled at 99.99% the speed of light, how much time would have elapsed on Earth while they hibernated?